Electrical connector

ABSTRACT

A latching of a latch piece to a latch portion of a lock release unit is released with a latch claw being retracted in a connector fitting portion by swing of a latch arm. A latching of an auxiliary latch piece to the latch portion is released with a lock claw being retracted in the connector fitting portion by swing of a lock arm and an auxiliary arm.

CROSS REFERENCE TO RELATED APPLICATION

This application is a Continuation of PCT Application No.PCT/JP2012/008120, filed on Dec. 19, 2012, and claims the priority ofJapanese Patent Application No. 2012-007302, filed on Jan. 17, 2012, thecontent of both of which is incorporated herein by reference.

BACKGROUND

1. Technical Field

The present invention relates to an electrical connector that is used tocharge a battery mounted on a vehicle such as an electric vehicle or ahybrid electric vehicle.

2. Related Art

Japanese Unexamined Patent Application Publication No. 10-275653discloses a related electrical connector. The electrical connector isused to charge a battery mounted on a vehicle such as an electricvehicle (EV) or a hybrid electric vehicle (HEV). Specifically, asillustrated in FIG. 1, an electrical connector 200 is fittable to apower receiving connector 300 provided with a power receiving terminal301, and includes a power feeding terminal 211 that is connected to thepower receiving terminal 301 when the electrical connector 200 is in astate of fitting to the power receiving connector 300.

The electrical connector 200 includes a connector fitting portion 210that is provided with the power feeding terminal 211 therein and fits tothe power receiving connector 300, and a connector case 220 thataccommodates an electric wire W connected to the power feeding terminal211.

In the connector case 220, the electric wire W connected to the powerfeeding terminal 211 inside the connector fitting portion 210 extendsthrough a handle portion 221 to the outside, and a slide portion 230absorbing an expansion/contraction according to a slide operation of thepower feeding terminal 211, the electric wire W, or the like is providedbetween the connector fitting portion 210 and the handle portion 221.

When fitting the electrical connector 200 to the power receivingconnector 300, a user holds the handle portion 221 and presses theelectrical connector 200 against the power receiving connector 300 tofit the connector fitting portion 210 to the power receiving connector300. Thereafter, when the user holds the handle portion 221 and pulls(turns) a turn lever 240, the power feeding terminal 211 slides by aslide portion 230 together with the electric wire W and thus the fittingto the power receiving terminal 301 of the power receiving connector 300is completed. At this time, the handle portion 221 also moves in afitting direction, and the slide portion 230 absorbs the sliding amount.

The electrical connector 200 is provided with a lever lock mechanism 250that prevents the turn lever 240 from turning while the power feedingterminal 211 and the power receiving terminal 301 are being connectedtogether. Accordingly, the power feeding terminal 211 can be preventedfrom sliding in a fitting release direction while the power feedingterminal 211 and the power receiving terminal 301 are being connectedtogether, and thus the connection between the power feeding terminal 211and the power receiving terminal 301 can be prevented from beingabruptly disconnected during the charge of a battery.

SUMMARY

However, in the above-described related electrical connector 200, evenwhen the connector fitting portion 210 is not in a state of completelyfitting to the power receiving connector 300, the battery may be in astate of being chargeable because the slide portion 230 disposed betweenthe connector fitting portion 210 and the handle portion 221 maycontract and thus the power feeding terminal 211 may move to a fittingside together with the electric wire W.

That is, since the electrical connector 200 cannot detect whether thepower receiving connector 300 and the connector fitting portion 210completely fit to each other, the battery may be charged while the powerreceiving connector 300 and the connector fitting portion 210 are in astate of half-fitting together.

An object of the present invention is to provide an electrical connectorthat can detect a fitting state between a power receiving connector anda connector fitting portion and thus can improve safety more securely.

An electrical connector in accordance with some embodiments includes: aconnector case including a connector fitting portion configured to fitto a power receiving connector and accommodating an electric wire; apower feeding terminal provided in the connector fitting portion andconnected to the electric wire, the power feeding terminal beingconfigured to be connected to a power receiving terminal of the powerreceiving connector in a fitting state where the power receivingconnector and the connector fitting portion are fitted together; a lockmechanism configured to prevent the power receiving connector and theconnector fitting portion from being separated from each other in thefitting state between the power receiving connector and the connectorfitting portion; a fitting detecting mechanism configured to detect thefitting state between the power receiving connector and the connectorfitting portion; and a lock release unit including an operating portionadvanceable from and retreatable to the connector case, and a latchportion configured to latch to a portion of the lock mechanism and aportion of the fitting detecting mechanism with the operating portionbeing retreated to the connector case. Upon release of the latching ofthe latch portion in the fitting state between the power receivingconnector and the connector fitting portion, the operating portion ofthe lock release unit is configured to move in a direction where theoperating portion advances from the connector case and become operatableto enable release of the fitting state between the power receivingconnector and the connector fitting portion. The lock mechanism includesa first lock unit including a lock arm swingably provided in theconnector case, and a lock claw provided at one end of the lock arm at aside of the power receiving connector and being protrudable andretractable from the connector fitting portion, and a second lock unitincluding an auxiliary arm connected to the lock arm, and an auxiliarylatch piece provided at an end of the auxiliary arm and configured tolatch to the latch portion of the lock release unit. The latching of theauxiliary latch piece to the latch portion of the lock release unit isreleased with the lock claw being retracted in the connector fittingportion by swing of the lock arm and the auxiliary arm. The fittingdetecting mechanism includes a latch arm swingably provided in theconnector case, a latch claw provided at one end of the latch arm at aside of the power receiving connector and being protrudable andretractable from the connector fitting portion, and a latch pieceprovided at the other end of the latch arm and being latchable to thelatch portion of the lock release unit. The latch claw is provided at anearer side than the lock claw in a fitting direction where theconnector fitting portion is fitted to the power receiving connector.The latching of the latch piece to the latch portion of the lock releaseunit is released with the latch claw being retracted in the connectorfitting portion by swing of the latch arm.

According to the above configuration, the lock mechanism includes thefirst lock unit and the second lock unit. The latching of the auxiliarylatch piece to the latch portion of the lock release unit is releasedwith the lock claw being retracted in the connector fitting portion byswing of the lock arm and the auxiliary arm. The latch claw is providedon the nearer side than the lock claw in the fitting direction of theconnector fitting portion to the power receiving connector. The latchingof the latch piece to the latch portion of the lock release unit isreleased with the latch claw being retracted in the connector fittingportion by swing of the latch arm. Accordingly, the latch claw isretracted into the connector fitting portion by the abutting on thepower receiving connector to be later than the lock claw. Therefore, thelatching between the latch piece and the latch portion of the lockrelease unit by the swing of the latch arm is not released unless thelatching between the auxiliary latch piece and the latch portion of thelock release unit by the swing of the lock arm is released.

That is, when only the latching between the auxiliary latch piece andthe latch portion of the lock release unit is released, the powerreceiving connector and the connector fitting portion are not in a stateof completely fitting together and thus the operating portion of thelock release unit does not protrude from the connector case and is yetunoperatable. On the other hand, when the latching between the auxiliarylatch piece and the latch portion of the lock release unit is releasedand also the latching between the latch piece and the latch portion ofthe lock release unit is released, the power receiving connector and theconnector fitting portion are in a state of completely fitting togetherand thus the operating portion of the lock release unit protrudes fromthe connector case and becomes operatable. Accordingly, the fittingstate between the power receiving connector and the connector fittingportion can be detected according to the positional state of theoperating portion of the lock release unit. Therefore, the battery canbe prevented from being charged in the half-fitting state, thus makingit possible to improve stability more securely.

The latch claw may be provided with the lock claw along the fittingdirection.

According to the above configuration, the latch claw is provided withthe lock claw along the fitting direction. Accordingly, for example,when the power receiving connector is damaged, even when the lock clawdoes not abut the power receiving connector and only the latch clawabuts the power receiving connector and is retracted into the connectorfitting portion, the latching between the lock piece and the latchportion of the lock release unit is not released. Therefore, when thepower receiving connector and the connector fitting portion are not in astate of completely fitting together (that is, when the lock claw is notlocked to the power receiving connector), the operating portion of thelock release unit does not protrude from the connector case and can bemade unoperatable.

The first lock unit may include a lock piece provided at the other endof the lock arm and being latchable to the latch portion of the lockrelease unit. The lock piece may be provided at a position facing theauxiliary latch piece. According to the above configuration, the lockpiece is provided at a position facing the auxiliary latch piece.Accordingly, the lock piece and the auxiliary latch piece can be latchedto the latch portion of the lock release unit, thus making it possibleto provide double locking. Therefore, even when the latching between theauxiliary latch piece and the latch portion of the lock release unit isreleased, the operating portion of the lock release unit does notprotrude from the connector case and is unoperatable until the latchingbetween the lock piece and the latch portion of the lock release unit isreleased. Accordingly, the abrupt protrusion of the operating portion ofthe lock release unit from the connector case can be securely prevented.

The first lock unit may include a lock arm shaft configured to pivotallysupport the lock arm to be swingable, and a lock arm bias memberconfigured to bias the lock arm in a direction where the lock clawprotrudes from the connector fitting portion. The fitting detectingmechanism may include a latch arm shaft configured to pivotally supportthe latch arm to be swingable, and a latch arm bias member configured tobias the latch arm in a direction where the latch claw protrudes fromthe connector fitting portion. The lock release unit may include arelease bias member configured to bias the lock release unit in thedirection where the operating portion advances from the connector case.

According to the above-described configuration, it is possible toprovide an electrical connector that can detect a fitting state betweena power receiving connector and a connector fitting portion and thus canimprove safety more securely.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a cross-sectional view illustrating a related electricalconnector.

FIG. 2 is a perspective view illustrating an electrical connectoraccording to a present embodiment.

FIG. 3 is a partially exploded perspective view illustrating theelectrical connector according to the present embodiment.

FIG. 4 is a cross-sectional view illustrating the electrical connectoraccording to the present embodiment.

FIG. 5 is a perspective view illustrating the inside of the electricalconnector according to the present embodiment.

FIG. 6A is an enlarged perspective view illustrating the neighborhood ofa second lock unit (a lock arm is omitted herein).

FIG. 6B is a plan/side view of a lock claw according to the presentembodiment.

FIG. 6C is a plan/side view of a latch claw according to the presentembodiment.

FIG. 7A is an enlarged perspective view illustrating a portion of afirst lock unit and a portion of the second lock unit according to thepresent embodiment.

FIG. 7B is an enlarged perspective view illustrating a portion of thefirst lock unit and the portion of the second lock unit according to thepresent embodiment.

FIG. 8 is an enlarged perspective view illustrating the neighborhood ofa lock release unit according to the present embodiment.

FIG. 9 is an enlarged perspective view illustrating the neighborhood ofthe first lock unit and a power feedability determining mechanism (thesecond lock unit is omitted herein) according to the present embodiment(No. 1).

FIG. 10 is an enlarged perspective view illustrating the neighborhood ofthe first lock unit and the power feedability determining mechanism (thesecond lock unit is omitted herein) according to the present embodiment(No. 2).

FIG. 11 is an enlarged perspective view illustrating the neighborhood ofthe lock release unit and the power feedability determining mechanismaccording to the present embodiment.

FIG. 12 is an enlarged perspective view illustrating the neighborhood ofthe power feedability determining mechanism according to the presentembodiment (No. 1).

FIG. 13 is an enlarged perspective view illustrating the neighborhood ofthe power feedability determining mechanism according to the presentembodiment (No. 2).

FIG. 14 is an enlarged perspective view illustrating the neighborhood ofa release switch hold portion according to the present embodiment.

FIG. 15 is a plan view (top view) illustrating the inside of theelectrical connector according to the present embodiment.

FIG. 16 is a cross-sectional view illustrating an operation (separatedstate) of the electrical connector according to the present embodiment.

FIG. 17 is a cross-sectional view illustrating an operation (fittingstate) of the electrical connector according to the present embodiment(No. 1).

FIG. 18 is a cross-sectional view illustrating an operation (fittingstate) of the electrical connector according to the present embodiment(No. 2).

FIG. 19 is an enlarged perspective view illustrating the neighborhood ofa lock mechanism and the lock release unit according to the presentembodiment (No. 1).

FIG. 20 is a cross-sectional view illustrating an operation (fittedstate) of the electrical connector according to the present embodiment.

FIG. 21 is an enlarged perspective view illustrating the neighborhood ofthe lock mechanism and the lock release unit according to the presentembodiment (No. 2).

FIG. 22 is an enlarged perspective view illustrating an operation of amovable shaft of the power feedability determining mechanism accordingto the present embodiment (No. 1).

FIG. 23 is an enlarged perspective view illustrating an operation of themovable shaft of the power feedability determining mechanism accordingto the present embodiment (No. 2).

FIG. 24 is a cross-sectional view illustrating an operation (separatingstate) of the electrical connector according to the present embodiment(No. 1).

FIG. 25 is a cross-sectional view illustrating an operation (separatingstate) of the electrical connector according to the present embodiment(No. 2).

FIG. 26 is a cross-sectional view (partially enlarged cross-sectionalview of FIG. 25) illustrating an operation of the electrical connectoraccording to the present embodiment.

DETAILED DESCRIPTION

Hereinafter, an electrical connector according to embodiments of thepresent invention will be described with reference to the drawings.Specifically, (1) Configuration of Electrical Connector, (2) Operationof Electrical Connector, (3) Function and Effect, and (4) OtherEmbodiments will be described.

Also, in the following description of the drawings, identical or similarreference numerals are given to identical or similar portions. However,it should be noted that the drawings are schematic and dimensionalratios and the like are different from actual ones.

Accordingly, specific sizes and the like should be determined inconsideration of the following description. In addition, there may besome differences in dimensional relations and ratios between the mutualdrawings.

(1) Configuration of Electrical Connector

First, a configuration of an electrical connector 100 according to thepresent embodiment will be described with reference to FIGS. 2 to 15.FIGS. 2 to 15 are views for describing a configuration of the electricalconnector 100 according to the present embodiment.

As illustrated in FIGS. 2 to 4, the electrical connector 100 is fittableto a power receiving connector 10 provided with a power receivingterminal 11A (see FIG. 4) used for power feeding, and includes a powerfeeding terminal 111A that is connected to the power receiving terminal11A when the electrical connector 100 is in a state of fitting to thepower receiving connector 10. As illustrated in FIG. 4, the powerreceiving connector 10 includes a connector housing 11 that accommodatesthe power receiving terminal 11A and a signal terminal 11B for a controlcircuit such as signaling/displaying, and a hood portion 12 that isintegrated with the connector housing 11 and has an inner periphery thatfits to a front end of the electrical connector 100 (an outer peripheryof a connector fitting portion 111).

As illustrated in FIGS. 3 and 4, the electrical connector 100 includes aconnector case 110, a lock mechanism 120, a fitting detecting mechanism130, a lock release unit 140, a power feedability determining mechanism150, and a release switch hold portion 160.

Connector Case

The connector case 110 has a cylindrical shape. As illustrated in FIG.5, the connector case 110 includes the connector fitting portion 111that is provided with the power feeding terminal 111A therein and fitsto the connector housing 11 of the power receiving connector 10, andaccommodates an electric wire W connected to the power feeding terminal111A.

A terminal receiving chamber 112 accommodating the power feedingterminal 111A is provided at the right and left sides of the connectorfitting portion 111, and a composite terminal receiving chamber 113accommodating a signal terminal 111B for a control circuit such assignaling/displaying is provided at top and bottom of the connectorfitting portion 111 (see FIG. 2). The electric wire W is connected tothe power feeding terminal 111A and the signal terminal 111B by pressurebonding or the like.

As illustrated in FIGS. 3 to 5, a lock chamber 114 accommodating thelock mechanism 120, the fitting detecting mechanism 130, and the lockrelease unit 140 is provided over the electric wire W in the connectorcase 110. A handle portion 115 held by an operator is provided at a rearbottom of the connector case 110, and the electric wire W extendsthrough the handle portion 115 to the outside.

Lock Mechanism

The lock mechanism 120 prevents the separation between the powerreceiving connector 10 and the electrical connector 100 when the powerreceiving connector 10 and the connector fitting portion 111 are in astate of fitting together (i.e. in a fitting state where the powerreceiving connector 10 and the connector fitting portion 111 are fittedtogether). As illustrated in FIG. 5, the lock mechanism 120 includes afirst lock unit 120A and a second lock unit 120B.

As illustrated in FIGS. 5 and 8 to 10, the first lock unit 120A includesa biforked lock arm 121 that is swingably provided in the connector case110, a lock claw 122 (FIGS. 2, 4 and 5) that is provided at one end ofthe lock arm 121 on a power receiving connector 10 side and isprotrudable/retractable from an outer periphery of the connector fittingportion 111, and a lock piece 123 that is provided at the other end ofthe lock arm 121 and is latchable to a latch groove portion 143 of thelock release unit 140.

The lock arm 121 is pivotally supported to be swingable by a lock armshaft 124, and the lock claw 122 is biased by a coil spring 125 as alock arm bias member toward a top direction TD that is a protrudingdirection from the outer periphery of the connector fitting portion 111.

The lock arm 121 is bent at the side of the lock claw 122 from the lockarm shaft 124 in a width direction WD perpendicular to afitting/separating direction FSD (see FIGS. 8 to 10). The lock arm 121is bent in a bottom direction BD at the position of the lock arm shaft124, and the lock piece 123 extends from the bent front end in thefitting/separating direction FSD (see FIGS. 5 and 8 to 10).

The fitting/separating direction FSD includes a direction of fitting theelectrical connector 100 to the power receiving connector 10(hereinafter referred to as a fitting direction FD) and a direction ofseparating the electrical connector 100 from the power receivingconnector 10 (hereinafter referred to as a separating direction SD).

The lock arm 121 is provided with a pressing portion 121A (see FIG. 14)that presses a micro switch MS that can detect the protrusion/retractionof the lock claw 122 from a cutout 116 (see FIGS. 2, 4 and 5) formed atthe connector fitting portion 111. As illustrated in FIG. 7A, when thelock claw 122 protrudes from the cutout 116 of the connector fittingportion 111, the pressing portion 121A does not press the micro switchMS. As illustrated in FIG. 7B, when the lock claw 122 retracts into theconnector fitting portion 111, the pressing portion 121A presses themicro switch MS.

A support groove 121.B (see FIGS. 8 to 10) supporting the second lockunit 120B is formed at the lock arm 121, and the second lock unit 120Babuts an edge portion of the support groove 121B and thus swingstogether with the lock arm 121.

The lock claw 122 is protrudable from/retractable to (advanceablefrom/retreatable to) the cutout 116 of the connector fitting portion 111to the outside. A power receiving connector 10 side of the lock claw 122is provided with a cam surface 122A inclining in the fitting/separatingdirection FSD, and a separating direction SD side of the lock claw 122is provided with a lock surface 122B perpendicular to thefitting/separating direction FSD (see FIG. 6B).

The lock piece 123 extends in the top direction TD, and is latchable tothe latch groove portion 143 (first latch groove portion 143A) of thelock release unit 140. The lock piece 123 is provided at a positionfacing a latch piece 133 of the fitting detecting mechanism 130, whichwill be described later. An air gap 123A (see FIGS. 8 to 10) opening inthe width direction WD perpendicular to the fitting/separating directionFSD is provided between the lock piece 123 and the lock arm 121.

While the lock claw 122 is in a state of retracting into the connectorfitting portion 111, the lock arm 121 swings, so that the lock piece 123latches to the latch groove portion 143 (first latch groove portion143A) of the lock release unit 140. While the lock claw 122 is in astate of protruding from the connector fitting portion 111, the lock arm121 swings, so that the latching of the lock piece 123 to the latchgroove portion 143 of the lock release unit 140 is released.

As illustrated in FIGS. 5 and 6A to 6C, the second lock unit 120Bincludes an auxiliary arm 126 that is connected to the lock arm 121, andan auxiliary latch piece 127 that is provided at an end of the auxiliaryarm 126 on the near side in the fitting direction FD and is latchable tothe latch groove portion 143 (second latch groove portion 143B) of thelock release unit 140.

The auxiliary arm 126 is pivotally supported to be swingable by the lockarm shaft 124, and the auxiliary latch piece 127 is biased by a coilspring 129 in the bottom direction BD. The auxiliary arm 126 is providedin the support groove 121B formed at the lock arm 121, and swingstogether with the lock arm 121.

The auxiliary latch piece 127 extends in the bottom direction BD, and islatchable to the latch groove portion 143 (second latch groove portion143B) of the lock release unit 140. The auxiliary latch piece 127 isprovided at a position facing the lock piece 123. While the lock claw122 is in a state of retracting into the connector fitting portion 111,the lock arm 121 swings, so that the latching of the auxiliary latchpiece 127 to the latch groove portion 143 (second latch groove portion143B) of the lock release unit 140 is released.

A power receiving connector 10 side of the auxiliary latch piece 127 isprovided with a lock surface 127B perpendicular to thefitting/separating direction FSD, and a separating direction SD side ofthe auxiliary latch piece 127 is provided with a cam surface 127Ainclining in the fitting/separating direction FSD (see FIGS. 6A and 8).

Fitting Detecting Mechanism

The fitting detecting mechanism 130 detects a fitting state between thepower receiving connector 10 and the connector fitting portion 111. Asillustrated in FIGS. 5 and 8 to 10, the fitting detecting mechanism 130includes a latch arm 131 that is swingably provided in the connectorcase 110, a latch claw 132 (FIGS. 2, 4 and 5) that is provided at oneend of the latch arm 131 on a power receiving connector 10 side and isprotrudable/retractable from the connector fitting portion 111, and alatch piece 133 that is provided at the other end of the latch arm 131and is latchable to the latch groove portion 143 (second latch grooveportion 143B) of the lock release unit 140.

The latch arm 131 is pivotably supported by a latch arm shaft 134, andthe latch claw 132 is biased by a coil spring 135 as a latch arm biasmember toward the top direction TD that is the protruding direction fromthe outer periphery of the connector fitting portion 111.

The latch arm 131 includes a protrusion 131A (see FIGS. 6A to 6C) as alatch state release portion that releases the latching between the latchgroove portion 143 and the release switch hold portion 160 (a hold latchpiece 162 to be described later) when the later-described latch grooveportion 143 (second latch groove portion 143B) of the lock release unit140 and the latch piece 133 latch together. The protrusion 131Aprotrudes in the bottom direction BD to abut the release switch holdportion 160 (a hold arm 161 to be described later).

The latch claw 132 is protrudable/retractable (advanceable/retreatable)to the outside from the cutout 116 formed at the connector fittingportion 111. A power receiving connector 10 side of the latch claw 132is provided with a cam surface 132A inclining in the fitting/separatingdirection FSD, and a separating direction SD side of the latch claw 132is provided with a perpendicular surface 132B perpendicular to thefitting/separating direction FSD (see FIG. 6C). The latch claw 132 isprovided on the nearer side than the lock claw 122 in the fittingdirection FD (that is, on the separating direction SD side of the lockclaw 122), and is provided with the lock claw 122 along thefitting/separating direction FSD (or along the fitting direction FD).

A width W2 of the latch claw 132 in the width direction WD is smallerthan a width W1 of the lock claw 122 in the width direction WD (seeFIGS. 6B and 6C). That is, the latch claw 132 is provided within aprojection surface of the lock claw 122 when viewed from a front side ofthe electrical connector 100.

The latch piece 133 is provided on the nearer side than the lock claw122 in the fitting direction of the connector fitting portion 111 to thepower receiving connector 10. While the latch claw 132 is in a state ofretracting into the connector fitting portion 111, the latch arm 131swings, so that the latching of the latch piece 133 to the latch grooveportion 143 (second latch groove portion 143B) of the lock release unit140 is released.

Lock Release Unit

The lock release unit 140 is slidable in the fitting/separatingdirection FSD, and is biased by a coil spring 144 to a rear side of thefitting direction FD (that is, a separating direction SD side). Asillustrated in FIG. 5, the lock release unit 140 includes a releaseswitch 141 as an operation portion advanceable from/retreatable to theconnector case 110, and a release body portion 142 integrated with therelease switch 141. The lock release unit 140 releases the latch statebetween the power receiving connector 10 and the connector fittingportion 111 by the pressing operation of the release switch 141.

The release body portion 142 is provided with the latch groove portion143 as a latch portion that is latched to a portion (lock piece 123 andauxiliary latch piece 127) of the lock mechanism 120 in the connectorcase 110 and to a portion (latch piece 133) of the fitting detectingmechanism 130. The latch groove portion 143 includes the first latchgroove portion 143A latching to the lock piece 123, and the second latchgroove portion 143B latching to the auxiliary latch piece 127. The firstlatch groove portion 143A is provided at a bottom side of the releasebody portion 142, and the second latch groove portion 143B is providedat a top side of the release body portion 142 to face the first latchgroove portion 143A.

A spring support portion 142A biased by the coil spring 144 as a releasebias member is provided on the upper side of the release body portion142. By the biasing of the coil spring 144 to the release body portion142, the release switch 141 is movable in the direction of protrudingfrom the connector case 110 (that is, the separating direction SD). Thatis, while the power receiving connector 10 and the connector fittingportion 111 are in a state of fitting together, when all the latching tothe latch groove portion 143 is released, the release switch 141 movesin the separating direction SD and becomes operatable, so that the lockrelease unit 140 can be used to release the fitting state between thepower receiving connector 10 and the connector fitting portion 111.

A regulation wall surface 145 (FIGS. 11 to 13) is provided under therelease body portion 142, and is movable in the fitting/separatingdirection FSD between a micro switch 151 and a movable shaft 153 of thepower feedability determining mechanism 150.

The regulation wall surface 145 moves in the fitting/separatingdirection FSD together with the release switch 141 and the release bodyportion 142. Specifically, when all the latch pieces (lock piece 123,auxiliary latch piece 127, and latch piece 133) latch to the latchgroove portion 143, the release switch 141 is in a state of beingpressed and the regulation wall surface 145 is located between the microswitch 151 and the movable shaft 153 as illustrated in FIG. 12. On theother hand, when all the latching to the latch groove portion 143 isreleased, the release switch 141 protrudes from the connector case 110,so that the regulation wall surface 145 retracts from a portion betweenthe micro switch 151 and the movable shaft 153 as illustrated in FIG.13.

Power Feedability Determining Mechanism

The power feedability determining mechanism 150 determines the powerfeedability between the power receiving connector 10 and the connectorfitting portion 111 by enabling power feeding when the power receivingconnector 10 and the connector fitting portion 111 are in a state offitting together (in a complete fitting state), and by disabling powerfeeding when the power receiving connector 10 and the connector fittingportion 111 are in a state of half-fitting together (in an incompletefitting state).

As illustrated in FIGS. 8 to 10, 11, and 12, the power feedabilitydetermining mechanism 150 includes the micro switch 151 and a solenoid152 that is provided at a position spaced apart from the micro switch151 in the width direction WD.

The micro switch 151 does not flow a current from the electricalconnector 100 to the power receiving connector 10 when the micro switch151 is not in a state of being abutted by a portion (movable shaft 153to be described below) of the solenoid 152.

The solenoid 152 includes a movable shaft 153 that moves in the widthdirection WD when the power receiving connector 10 and the connectorfitting portion 111 change from a half-fitting state to a fitting state,and a regulation arm 154 (see FIGS. 9 and 10) that moves according tothe movement of the movable shaft 153.

The movable shaft 153 moves according to information (instruction) froma power supply unit (not illustrated) connected to an end portion of theelectric wire W extending from the handle portion 115 to the outside.When the above-described regulation wall surface 145 of the lock releaseunit 140 is located between the micro switch 151 and the movable shaft153, the movable shaft 153 does not abut the micro switch 151 (see FIG.12).

The regulation arm 154 is insertable/extractable into/from the air gap123A formed at the lock arm 121. The regulation arm 154 is inserted intothe air gap 123A to regulate the swing of the lock arm 121. Asillustrated in FIGS. 8 to 10, the regulation arm 154 includes aconnection portion 154A connected to the movable shaft 153, an armportion 154B provided in the fitting/separating direction FSD, and afront end portion 154C insertable into the air gap 123A. For example, asillustrated in FIG. 9, the front end portion 154C is located outside theair gap 123A when the movable shaft 153 is in a state of being spacedapart from the micro switch 151. On the other hand, as illustrated inFIG. 10, when the front end portion 154C moves in the width direction WDtogether with the movable shaft 153 and the movable shaft 153 is in astate of abutting the micro switch 151, the front end portion 154C islocated inside the air gap 123A.

Release Switch Hold Portion

The release switch hold portion 160 holds the release switch 141 of thelock release unit 140 when the release switch 141 is in a state of beingpressed. As illustrated in FIGS. 14 and 15, the release switch holdportion 160 includes a hold arm 161 that is swingably provided in theconnector case 110, and a hold latch piece 162 that is provided at anear side end portion of the hold arm 161 in the fitting direction FDand is latched to the second latch groove portion 143B of the lockrelease unit 140 at a position where the release switch 141 is pressed.

The hold arm 161 is pivotably supported by a hold arm shaft 163, and arear side in the fitting direction FD (that is, the separating directionSD side) is biased by a coil spring 164 as a hold arm bias member towardthe bottom direction BD.

(2) Operation of Electrical Connector

Next, an operation of the electrical connector 100 according to thepresent embodiment will be described with reference to the drawings.FIGS. 16 to 26 are views for describing an operation of the electricalconnector 100 according to the present embodiment.

The electrical connector 100 charges a battery (not illustrated) mountedon a vehicle such as an electric vehicle (EV) or a hybrid electricvehicle (HEV) according to information (instruction) from a power supplyunit (not illustrated) connected to an end portion of the electric wireW extending from the handle portion 115 to the outside, when being in astate of fitting to the power receiving connector 10.

From Separating State to Fitting State

As illustrated in FIG. 16, when the power receiving connector 10 and theelectrical connector 100 are in a state of separating from each other,the lock claw 122 and the latch claw 132 protrude from the cutout 116 ofthe connector fitting portion 111. At this time, the latch piece 133 islatched to the second latch groove portion 143B of the lock release unit140. Since the auxiliary latch piece 127 of the second lock unit 120B isprovided on the separating direction SD side from the latch piece 133,the auxiliary latch piece 127 is in a state of being immediatelylatchable to the second latch groove portion 143B when the latchingbetween the latch piece 133 and the second latch groove portion 143B isreleased while the auxiliary latch piece 127 is not in a state of beingcompletely latched to the second latch groove portion 143B. In thisseparating state, the release switch 141 is in a state of beingunoperatable.

Subsequently, as illustrated in FIG. 17, when the power receivingconnector 10 and the electrical connector 100 are gradually fittedtogether, the hood portion 12 of the power receiving connector 10retreats (presses) the lock claw 122 into the connector fitting portion111. Then, the lock arm 121 swings, and thus the auxiliary latch piece127 deviates from the second latch groove portion 143B. At this time,the latch piece 123 is inserted into the first latch groove portion 143Aof the lock release unit 140.

Subsequently, as illustrated in FIG. 18, when the power receivingconnector 10 and the electrical connector 100 are further fittedtogether, the hood portion 12 of the power receiving connector 10presses the latch claw 132 into the connector fitting portion 111. Then,the latch arm 131 swings, and thus the latch piece 133 removes from thesecond latch groove portion 143B. Then, as illustrated in FIG. 19, thelock piece 123 is latched to the first latch groove portion 143A of thelock release unit 140, and the release switch 141 is yet in a state ofbeing unoperatable.

Subsequently, as illustrated in FIG. 20, when the power receivingconnector 10 and the electrical connector 100 are completely fittedtogether, the lock claw 122 protrudes from the cutout 116 of theconnector fitting portion 111 in the hood portion 12 of the powerreceiving connector 10 to be latched to the power receiving connector10, and the lock piece 123 removes from the first latch groove portion143A of the lock release unit 140.

As illustrated in FIGS. 20 and 21, the release switch 141 moves towardthe separating direction SD because all the latching to the latch grooveportion 143 is released. Accordingly, the regulation wall surface 145 ofthe lock release unit 140 located between the micro switch 151 and themovable shaft 153 moves to the separating direction SD side. Then, asillustrated in FIG. 22, the movable shaft 153 of the power feedabilitydetermining mechanism 150 protrudes along the width direction WD andpresses the micro switch 151, thereby becoming a chargeable state.

Charge Mode

As illustrated in FIG. 23, in a charge mode, even when the releaseswitch 141 is about to be moved in the fitting direction FD, theregulation wall surface 145 bumps against the movable shaft 153 abuttingthe micro switch 151. This may make it impossible to operate the releaseswitch 141.

In addition, the regulation arm 154 is inserted into the air gap 123A ofthe lock arm 121 (see FIG. 10). Therefore, even when the release switch141 is about to be moved in the fitting direction FD, the swing of thelock arm 121 can be prevented, so that the removal of the lock claw 122from the connector housing 11 can be prevented.

Accordingly, the fitting of the power receiving connector 10 and theconnector fitting portion 111 can be prevented from being accidentallyreleased when charging the battery (not illustrated) mounted on thevehicle.

From Fitting State to Separating State

When the charging of the battery (not illustrated) mounted to thevehicle is completed, the movable shaft 153 of the solenoid 152 returnsto the original state, so that the abutting between the micro switch 151and the movable shaft 153 is released (see FIG. 13). Then, a gap occursbetween the micro switch 151 and the movable shaft 153, and theregulation arm 154 retracts from the air gap 123A of the lock arm 121(see FIG. 9). Accordingly, the lock release unit 140 is movable alongthe fitting direction FD.

Subsequently, as illustrated in FIG. 24, when the release switch 141 ispressed against the fitting direction FD side, the release body portion142 of the lock release unit 140 abuts an inclined surface 121C of thelock arm 121 and slides on the inclined surface 121C. Then, since thelock arm 121 swings, the lock piece 123 is latched to the first latchgroove portion 143A of the lock release unit 140 and the hold latchpiece 162 of the release switch hold portion 160 is latched to thesecond latch groove portion 143B of the lock release unit 140. At thistime, since the lock claw 122 is retracted into the connector fittingportion 111, the power receiving connector 10 and the electricalconnector 100 can be separated from each other.

Subsequently, as illustrated in FIGS. 25 and 26, when the powerreceiving connector 10 and the electrical connector 100 are graduallyseparated from each other, the latch arm 131 swings and the latch claw132 protrudes from the cutout 116 of the connector fitting portion 111,so that the latch piece 133 is latched to the second latch grooveportion 143B of the lock release unit 140. At this time, the protrusion131A of the latch arm 131 swings the hold arm 161 such that the fittingdirection FD side is located in the bottom direction BD to be lower thanthe hold arm shaft 163 of the hold arm 161. Accordingly, the hold latchpiece 162 of the release switch hold portion 160 removes from the secondlatch groove portion 143B of the lock release unit 140.

Then, when the power receiving connector 10 and the electrical connector100 are completely separated from each other, the lock claw 122protrudes from the cutout 116 of the connector fitting portion 111 (seeFIG. 16). Simultaneously, the lock piece 123 removes from the firstlatch groove portion 143A of the lock release unit 140, and theauxiliary latch piece 127 is in a state of being latchable to the secondlatch groove portion 143B of the lock release unit 140.

(3) Operation and Effect

In the above-described embodiment, while the lock claw 122 is in a stateof retracting into the connector fitting portion 111, the lock arm 121and the auxiliary arm 126 swing, so that the latching of the auxiliarylatch piece 127 to the second latch groove portion 143B is released. Inaddition, the latch claw 132 is provided on the nearer side than thelock claw 122 in the fitting direction FD of the connector fittingportion 111 to the power receiving connector 10. While the latch claw132 is in a state of retracting into the connector fitting portion 111,the latch arm 131 swings, so that the latching between the latch piece133 and the second latch groove portion 143B is released. Accordingly,the latch claw 132 is retracted into the connector fitting portion 111by the abutting on the hood portion 12 of the power receiving connector10 to be later than the lock claw 122. Therefore, the latching betweenthe latch piece 133 and the second latch groove portion 143B by theswing of the latch claw 132 is not released unless the latching betweenthe auxiliary latch piece 127 and the second latch groove portion 143Bby the swing of the auxiliary arm 126 is released.

That is, when only the latching between the auxiliary latch piece 127and the second latch groove portion 143B by the swing of the auxiliaryarm 126 is released, the power receiving connector 10 and the connectorfitting portion 111 are not in a state of completely fitting together,and thus the release switch 141 does not protrude from the connectorcase 110 and is yet unoperatable. On the other hand, when the latchingbetween the lock piece 123 or the auxiliary latch piece 127 and thelatch groove portion 143 is released and also the latching between thelatch piece 133 and the second latch groove portion 143B is released,the power receiving connector 10 and the connector fitting portion 111are in a state of completely fitting together, and thus the releaseswitch 141 protrudes from the connector case 110 and is operatable.Accordingly, the fitting state between the power receiving connector 10and the connector fitting portion 111 can be detected according to thepositional state of the release switch 141. Therefore, the battery canbe prevented from being charged in the half-fitting state, thus makingit possible to improve stability more securely.

In the present embodiment, the latch claw 132 is provided with the lockclaw 122 along the fitting direction FD. Accordingly, for example, whenthe connector housing 11 or the hood portion 12 of the power receivingconnector 10 is damaged, even when the lock claw 122 does not abut thehood portion 12 of the power receiving connector 10 and only the latchclaw 132 abuts the hood portion 12 and is retracted into the connectorfitting portion 111, the latching between the lock piece 123 or theauxiliary latch piece 127 and the latch groove portion 143 is notreleased. Therefore, when the power receiving connector 10 and theconnector fitting portion 111 are not in a state of completely fittingtogether (that is, when the lock claw 122 is not locked to the connectorhousing 11), the release switch 141 does not protrude from the connectorcase 110 and can be made unoperatable.

In the present embodiment, the lock piece 123 is provided at a positionfacing the auxiliary latch piece 127. Accordingly, the lock piece 123and the auxiliary latch piece 127 can be latched to the latch grooveportion 143 (first latch groove portion 143A and second latch grooveportion 143B) of the lock release unit 140, thus making it possible toprovide double locking. Therefore, even when the latching between theauxiliary latch piece 127 and the second latch groove portion 143B isreleased, the release switch 141 does not protrude from the connectorcase 110 and is unoperatable until the latching between the lock piece123 and the first latch groove portion 143A is released. Accordingly,the abrupt protrusion of the release switch 141 from the connector case110 can be securely prevented.

In the present embodiment, while the lock claw 122 is in a state ofretracting into the connector fitting portion 111, the lock arm 121swings and the lock piece 123 is latched to the first latch grooveportion 143A. While the lock claw 122 is in a state of protruding fromthe connector fitting portion 111, the lock arm 121 swings and thelatching of the lock piece 123 to the first latch groove portion 143A isreleased. That is, the latching between the lock piece 123 and the firstlatch groove portion 143A by the swing of the lock arm 121 is notreleased unless the lock claw 122 protrudes from the connector fittingportion 111 (that is, unless the lock claw 122 is locked to the powerreceiving connector 10). Therefore, until the lock claw 122 is locked tothe power receiving connector 10, the release switch 141 does notprotrude from the connector case 110 and can be made unoperatable, thusmaking it possible to improve safety more securely.

In the present embodiment, the width W2 of the latch claw 132 is smallerthan the width W1 of the lock claw 122. Accordingly, it is possible toprevent the case where the lock claw 122 is not retracted into theconnector fitting portion 111 and only the latch claw 132 is abruptlyretracted into the connector fitting portion 111.

In the present embodiment, the regulation wall surface 145 is providedunder the release body portion 142, and is movable in thefitting/separating direction FSD between the micro switch 151 and themovable shaft 153 of the power feedability determining mechanism 150.Accordingly, when the release switch 141 protrudes from the connectorcase 110 and is operatable, the regulation wall surface 145 retractsfrom the portion between the micro switch 151 and the movable shaft 153.Therefore, unless the power receiving connector 10 and the connectorfitting portion 111 are not completely fitted together, the micro switch151 is not turned on, and the battery can be prevented from beingcharged.

Also, in a charge mode, even when the release switch 141 is about to bemoved in the fitting direction FD, the regulation wall surface 145 bumpsagainst the movable shaft 153 abutting the micro switch 151. Therefore,in the charge mode, the release switch 141 can be prevented from movingin the fitting direction FD, so that the operation of the release switch141 can be prevented. That is, in the charge mode, the lock claw 122 canbe prevented from being removed and released from the power receivingconnector 10, so that the power receiving connector 10 and the connectorfitting portion 111 can be prevented from be separated from each otherdue to a fitting error thereof.

In the present embodiment, the regulation arm 154 isinsertable/extractable into/from the air gap 123A of the lock arm 121according to the movement of the movable shaft 153, and is inserted intothe air gap 123A to regulate the swing of the lock arm 121. Accordingly,the lock arm 121 does not swing when the lock claw 122 is in a state ofprotruding from the connector fitting portion 111. Therefore, thefitting of the power receiving connector 10 and the connector fittingportion 111 can be prevented from be accidentally released duringcharging.

In the present embodiment, the electrical connector 100 further includesthe release switch hold portion 160 that holds the position of the lockrelease unit 140 while the release switch 141 is in a state of beingpressed. Accordingly, even when the release switch 141 is notcontinuously pressed in the fitting direction FD, the release switch 141does not protrude from the connector case 110 and can be held in anunoperatable state. Accordingly, the operability is improved because anoperator need not perform the operation while pressing the releaseswitch 141.

In addition, the latch arm 131 includes the protrusion 131A thatreleases the latching between the hold latch piece 162 and the secondlatch groove portion 143B when the latch piece 133 and the second latchgroove portion 143B are latched together. That is, while the releaseswitch 141 does not protrude from the connector case 110, the latchingbetween the hold latch piece 162 and the second latch groove portion143B is released and the latch piece 133 and the second latch grooveportion 143B are latched together. Therefore, the release switch 141 canbe prevented from protruding from the connector case 110 accidentallywhen the connector fitting portion 111 is separated from the powerreceiving connector 10.

(4) Other Embodiments

Although the present invention has been described based on the aboveembodiments, it should not be understood that the statements and thedrawings constituting a part of this disclosure limit the presentinvention. From this disclosure, various alternative embodiments,examples, and operation techniques will become apparent to those skilledin the art.

For example, the embodiments of the present invention may be changed asfollows. Specifically, although the electrical connector 100 has beendescribed as a connector charging a battery (not illustrated) mounted ona vehicle such as an electric vehicle (EV) or a hybrid electric vehicle(HEV), the present invention is not limited thereto. The electricalconnector 100 may be used to charge other batteries.

Also, although the respective arms have been described as being biasedby coil springs as bias members, the present invention is not limitedthereto. The respective arms may be biased by other springs, cylinders,or the like.

Also, the respective configurations of the electrical connector 100 arenot limited to the description in the present embodiment, and may be anyother configurations that can be implemented. For example, it is onlyrequired that the electrical connector 100 includes at least theconnector case 110, the lock mechanism 120, the fitting detectingmechanism 130, and the lock release unit 140. The electrical connector100 may not include the power feedability determining mechanism 150 andthe release switch hold portion 160.

As described above, the present invention naturally includes variousembodiments that are not described herein. Accordingly, the technicalscope of the present invention should be only determined according tothe subject matter recited in the scope of claims regarded asappropriate based on the above description.

What is claimed is:
 1. An electrical connector comprising: a connectorcase including a connector fitting portion configured to fit to a powerreceiving connector and accommodating an electric wire; a power feedingterminal provided in the connector fitting portion and connected to theelectric wire, the power feeding terminal being configured to beconnected to a power receiving terminal of the power receiving connectorin a fitting state where the power receiving connector and the connectorfitting portion are fitted together; a lock mechanism configured toprevent the power receiving connector and the connector fitting portionfrom being separated from each other in the fitting state between thepower receiving connector and the connector fitting portion; a fittingdetecting mechanism configured to detect the fitting state between thepower receiving connector and the connector fitting portion; and a lockrelease unit including an operating portion advanceable from andretreatable to the connector case, and a latch portion configured tolatch to a portion of the lock mechanism and a portion of the fittingdetecting mechanism with the operating portion being retreated to theconnector case, wherein, upon release of the latching of the latchportion in the fitting state between the power receiving connector andthe connector fitting portion, the operating portion of the lock releaseunit is configured to move in a direction where the operating portionadvances from the connector case and become operatable to enable releaseof the fitting state between the power receiving connector and theconnector fitting portion, wherein the lock mechanism comprises a firstlock unit including a lock arm swingably provided in the connector case,and a lock claw provided at one end of the lock arm at a side of thepower receiving connector and being protrudable and retractable from theconnector fitting portion, and a second lock unit including an auxiliaryarm connected to the lock arm, and an auxiliary latch piece provided atan end of the auxiliary arm and configured to latch to the latch portionof the lock release unit, wherein the latching of the auxiliary latchpiece to the latch portion of the lock release unit is released with thelock claw being retracted in the connector fitting portion by swing ofthe lock arm and the auxiliary arm, wherein the fitting detectingmechanism includes a latch arm swingably provided in the connector case,a latch claw provided at one end of the latch arm at a side of the powerreceiving connector and being protrudable and retractable from theconnector fitting portion, and a latch piece provided at the other endof the latch arm and being latchable to the latch portion of the lockrelease unit, wherein the latch claw is provided at a nearer side thanthe lock claw in a fitting direction where the connector fitting portionis fitted to the power receiving connector, and wherein the latching ofthe latch piece to the latch portion of the lock release unit isreleased with the latch claw being retracted in the connector fittingportion by swing of the latch arm.
 2. The electrical connector accordingto claim 1, wherein the latch claw is provided with the lock claw alongthe fitting direction.
 3. The electrical connector according to claim 1,wherein the first lock unit includes a lock piece provided at the otherend of the lock arm and being latchable to the latch portion of the lockrelease unit, and the lock piece is provided at a position facing theauxiliary latch piece.
 4. The electrical connector according to claim 1,wherein the first lock unit includes a lock arm shaft configured topivotally support the lock arm to be swingable, and a lock arm biasmember configured to bias the lock arm in a direction where the lockclaw protrudes from the connector fitting portion, the fitting detectingmechanism includes a latch arm shaft configured to pivotally support thelatch arm to be swingable, and a latch arm bias member configured tobias the latch arm in a direction where the latch claw protrudes fromthe connector fitting portion, and the lock release unit includes arelease bias member configured to bias the lock release unit in thedirection where the operating portion advances from the connector case.